/Engine/Plugins/Runtime/Synthesis/Source/Synthesis/Classes/SynthComponents/SynthComponentWaveTable.h
This will override the current sound wave if one is set, stop audio, and reload the new sound wave.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Synth|Components|Audio") void SetSoundWave ( [USoundWave](API\Runtime\Engine\Sound\USoundWave) * InSoundWave )